seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-1321"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23736.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"fixed": "1.4.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
},
{
"extracted_events": [
{
"range": [
{
"fixed": "1.4.1"
},
{
"last_affected": "1.4.0"
}
],
"source": "DESCRIPTION"
}
]
}
]
}{
"extracted_events": [
{
"range": [
{
"fixed": "ce9408ebc87312fcad345a73c172212f2a798060"
}
],
"source": "REFERENCES_COMMIT"
}
]
}